In the four-way contest, 82 percent of Republican likely voters support Trump and 82 percent of Democratic likely voters support Clinton, with the former secretary of state taking a narrow 2-point lead among independent likely voters, according to the survey.

Clinton also leads Trump by 12 points among respondents who said they had already voted, 51-39.

Her lead is narrower than in the last WSJ/NBC poll released on Oct. 11 when she led Trump by 9 points, 46-37, among likely voters in a four-way matchup.